I will have to try that one.
I use the one from DSL Reports, a broadband site and forums.
http://www.dslreports.com/stest
Here is the one from your link:
Your current bandwidth reading is:
2.86 Mbps
which means you can download at 366.05 KB/sec. from our servers.
28.8 kbps dial-up
33.6 kbps dial-up
53.3 kbps dial-up
56 kbps ISDN
128 kbps ISDN
384 kbps DSL
768 kbps DSL
1000 kbps DSL
1500 kbps DSL/T1/Cable Modem
2928.4 kbps YOU
That is pretty close to my 3.0 cap Comcast has on me.